Active noise control system using upper computer to achieve real-time offline update
A bit-computer, off-line technology, applied in the field of active noise control system design, can solve the problem of large amount of calculation of the system, achieve strong re-control ability, good noise suppression effect, and save the effect of hardware implementation pressure
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[0033] The following takes a single-channel feed-forward active noise control system as an example, combined with the attached figure 2 The specific implementation of the present invention will be described in detail. The single-channel feedback active noise control system, the multi-channel feedforward active noise control system, and the multi-channel feedback active noise control system are roughly the same as in this example, so they will not be repeated here.
[0034] The single-channel active noise control system updated offline in real time by the host computer is configured in the noise area to be controlled. First, the reference microphone in the external device continuously picks up noise sound waves, which are processed by amplifiers and analog-to-digital converters and then passed to the controller. At the same time, the error microphone in the external device continuously picks up the residual noise sound wave at the specified position, and passes it to the cont...
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